The good vs evil, light vs, dark focus you are giving this story isn't really my thing. Wouldn't it have been better to go with a grey Naruto? Capable of being the bad guy in the right circumstances, only to then turn around and be heroic. I always thought the good vs evil theme in story's was a bit naive.

The style that Honoka has been taught is part of the killing fist, and the problem doesn't lie there but Yami as well because all of their masters practice the killing fist philosophy, and it is a process that consumes when you kill someone.

I only want to say don't forget that Kenichi becomes the strongest because he reminds me of Naruto not very talented compared to others but intense hard work, and training made him very powerful enough to defeat the Elder to win the hand of Miu because he does become the strongest.